Table 3. AIC scores of term combinations for each hypothesis model for the east coast.

Model	Number of Terms	Factors	AIC Score
Null	0		172.42
Stormwater	1	population in water catchment	150.95
	2	population in water catchment, no. drain outlets in 5 km	158.37
	3	population in water catchment, no. drain outlets in 5 km, distance to nearest drain	151.82
Beach Users	1	distance to public road	143.08
	2	distance to public road, cleanup	127.72
	3	distance to public road, cleanup, population in 25 km	128.96
	4	distance to public road, cleanup, population in 25 km, no. carparks	130.88
	5	distance to public road, cleanup, population in 25 km, no. carparks, population in 5 km	131.75
	6	distance to public road, cleanup, population in 25 km, no. carparks, population in 5 km, no. people on shore	133.70
Marine Transport	1	mean onshore wind speed	147.93
	2	mean onshore wind speed, on-day wind speed	128.16
	3	mean onshore wind speed, on-day wind speed, distance	128.96
	4	aspect, onshore wind 0900 hrs, onshore wind 1500 hrs, on-day wind speed	111.48
	5	aspect, onshore wind 0900 hrs, onshore wind 1500 hrs, on-day wind speed, distance	113.46
	6	aspect, onshore wind 0900 hrs, onshore wind 1500 hrs, on-day wind speed, distance, mean onshore wind speed	114.76
Physical Characteristics	1	substrate	131.83
	2	substrate, gradient	113.99
	3	substrate, gradient, shape	96.85
Final Full Model	10	population in water catchment, distance to public road, cleanup, aspect, onshore wind 0900 hrs, onshore wind 1500 hrs, on-day wind speed, substrate, shape, gradient	89.31

Each line displays the best AIC score for each combination (i.e. the best score when a single term, two terms, three terms etc. are included in the model). The most parsimonious set of terms for each model are highlighted.